JP2000236387A - Detour connecting method for connection call of exchange - Google Patents

Abstract

PROBLEM TO BE SOLVED: To efficiently use a repeating line of a network constituted by an exchange by retrieving detour route setting information according to an originating station shown in originating station information and setting a detour route. SOLUTION: Call control information sent and received between two exchanges, i.e., and A station (station number 1) and a B station (station number 2) is constituted by adding originating station information showing the extension class 'X' of an originating extension and the station number 'Y' of the originating station to terminating station information '8-ab-cd-ef' showing the station number of a terminating station and an extension number. Each exchange is provided with a detour route setting table 1. This detour route setting table 1 contains detour route setting information showing the setting contents of detour routes by originating stations (exchange) constituting the network. Each exchange sets a detour route by performing retrieval from the detour setting table 1 according to the originating station of a connection call indicated by the originating station information.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for alternately connecting a connection call in an exchange.

[0002]

2. Description of the Related Art In the conventional connection call detour connection method, the same connection control is performed for all the connection calls, so that the connection is normally passed through a trunk line having a very small number of lines. There is a problem that a line is occupied for a call that does not occur and a call that is supposed to mainly use the trunk line is not secured.

[0003] An object of the present invention is to efficiently use a trunk line of a network constituted by exchanges in order to improve the above-mentioned problems.

[0004]

In order to achieve the above object, according to the present invention, transmitting station information indicating a transmitting station of a connected call is transmitted and received between exchanges together with the connected call, and a detour route is set for each transmitting station. Means is adopted in which detour route setting information indicating the contents is stored in each exchange, and the detour route setting information is searched based on the transmitting station indicated in the transmitting station information to set a detour route.

In the above means, the above means employs means for forming detour route setting information so that a connection call of a certain transmitting station does not pass through a trunk line which normally does not pass.

[0006]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing an embodiment of a method for connecting and bypassing a connection call in an exchange according to the present invention;

In this embodiment, the call control information (that is, the destination station number and extension number of the destination) is added to the call control information transmitted and received between the exchanges, and the detour connection of the connection call is controlled based on the call source information. Is what you do.

FIG. 1 is a block diagram showing a functional configuration of the exchange in the present embodiment. In this figure, call control information transmitted and received between two exchanges, that is, an A station (station number 1) and a B station (station number 2) is called station information “8-ab” indicating the station number and extension number of the called station. −cdef ”is added with transmission station information indicating the extension class“ X ”of the transmission extension and the station number“ Y ”of the transmission station. In this case, the transmitting station is the station A, and the station number Y is "1".

[0009] Each exchange is provided with a bypass route setting table 1. The detour route setting table 1 stores detour route setting information indicating detour route setting contents for each of the transmitting stations (switches) constituting the network. Each exchange performs a detour route setting table 1 based on the originating station of the connected call indicated by the originating station information.
Set a detour route by searching for.

Next, consider a network composed of stations A to G as shown in FIG. The stations C to G shown in this figure are configured in the same manner as the stations A and B described above, and each has a detour route setting table 1. In such stations A to G, the detour route setting information stored in the detour route setting table 1 is set for each station according to the relay line connected to itself.

Now, when a call is transmitted from the extension a connected to the station A to the extension b connected to the station G, the following processing is performed according to the conventional connection call alternate connection method. That is, if there is an empty line in the trunk line, station A → station C → station E → G
Stations are connected by a route (that is, the shortest route). Here, when all the lines between the stations C and E are busy, the station C transmits a connection call to the station D as a detour.

At the station D, the connection call received from the station C based on the station number and extension number of the called station is transmitted to the extension b of the station G.
Is determined to be transmitted to the G station, and if there is a vacancy in the direct route to the G station, the connection call is transmitted to the G station. However, when all the lines between the stations D and G are busy, an attempt is made to transmit a connection call to the station E as the first detour route,
When all the stations are busy, the connection call is transmitted to the station F as the second detour route.

With respect to such a conventional detour connection method,
In the present embodiment, the detour connection is controlled by using the source station information and the detour route setting table 1 included in the call control information for the detour connection control.
The following processing is performed.

That is, in response to the connection call transmitted during the busy time between the stations C and E, the station D transmits the connection call originating from the station A based on the originating station information. When it is determined that the connection route is to be transmitted, transmission is attempted to the direct route to the G station and to the E station (located on the shortest route), which is the first detour route, but to the second route. It is not transmitted to the detour route, that is, the F station that is not located on the shortest route.

In the detour route setting table 1 of the station D, only the direct route and the first detour route are described as the detour route setting information when the originating station is the station A.
Therefore, the station D searches the detour route setting table 1 using the originating station of the connection call based on the originating station information, that is, the station A, thereby connecting the direct route and the first detour route with the connection of the connection call. First.

According to such detour connection control, it is possible to prevent the relay line from being occupied by a call between the A station and the G station which does not normally pass between the F station and the G station. Can be. Therefore, it is possible to prevent a call passing between the F station and the G station from being disturbed by a call between the A station and the G station.

[0017]

As described above, the detour connection method for the connection call in the exchange according to the present invention has the following effects. (1) Transmitting station information indicating the transmitting station of the connected call is transmitted and received between the exchanges together with the connected call, and detour route setting information indicating the setting contents of the detour route for each transmitting station is stored in each switch. Since the detour route is set by searching the detour route setting information based on the transmitting station shown in (1), more flexible detour connection control is possible in order to efficiently use the trunk line in the network. (2) Since the detour route setting information is formed so that the connection call of a certain calling station does not pass through a relay line which normally does not pass, the connection call of the certain calling station occupies the relay line. It is possible to eliminate the interruption of the connection call passing through the trunk line.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a functional configuration of an embodiment of the present invention.

FIG. 2 is a diagram illustrating a configuration example of a network to which an embodiment of the present invention is applied;

[Explanation of symbols]

 1 ... detour route setting table

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Claims (2)

[Claims] 1. An exchanging station information indicating an originating station of a connected call is transmitted and received between exchanges together with a connected call, and detour route setting information indicating setting contents of a detour route is stored in each exchange for each originating station. A detour connection method for a connection call in an exchange, wherein the detour route is set by retrieving the detour route setting information based on an originating station indicated in station information. 2. The detour connection of a connection call in an exchange according to claim 1, wherein the detour route setting information is formed so that a connection call of a certain calling station does not pass through a trunk line which normally does not pass. Method.